Sheet metal working machine



Sept. 13, 1949: H. L. JOHNSON I SHEET METALWORKING MACHINE 3 Sheets$heet 1 Filed March 10, 1945 INVENTOR HERBERT L. JQHNSON. .Wb

ATTORNEY.

Se t. 13, 1949. H L. JOHNSON 2,431,513

SHEET METALWORKING MACHINE Filed March 10, 1945 3 Sheets-Sheet 2 INVENTOR i ATTORNEY.

\ l l i l l I l l I L 41 HERBERT L. JOHNSQN.

RWLJ

Sept. 13, 1949. H. JOHNSON 2,481,518

SHEET METALWORKING MACHINE Filed March 10, 1945 3 Sheets-Sheet 3 FIG. 5.

HERBERT L JOHNSON iNVENTOR FIG. 6.

J J V Patented Sept. 13, 1949 UNITED STATES PATENT OFFICE.

SHEET METAL. WORKING MACHINE Herbert L. Johnson, Peabody, Mass.

Application March 10, 1945, Serial No 582,098

10 Claims; (01. 153-26) (Granted under the act of March 3,1883, as amended April 30, 1928; 370 0% G. 757) l 2, This invention relates to sheet. metal working operative relationbetween theanvil and tool;..theii:' machines and is. illustrated. herein as embodied angular relation with respect. to. the-plane ofthe.

in. a machine for forming. a flange at oneor web-of theblank maybev varied. Hence, alfianges moremargins' of. aflat blank. I may be formed; at an exact right angle; to the Joints are commonly. made. in duct work by 5 web,.regard1ess. ot' the: resiliency: of. the material joining with a gasket between them, two disk employed. Moreover,. the flange. may also he.

like members each having a flange to which the formed at an. angle to: the web which is slightly duct sections tobe joinedlarefitted". Such flanged acute or obtuse it in so. doing the fit. betweenathe members are commonly made from an. annular flange and. the duct section: tobe=joined therewith: blank; the inner margin of which is: bent at a ll)? would be improved.

right angle totheweb: of: the; blank, the diameter other instances of the use of flanged members of the-flanged portion; ot the blank being such. as ca-ll' the forming of the flanges on the outer" to permit it to fit closely within the duct. One margins of blanks. For example, suchmachine for: making flanged-i members of this flanged membersmay be used: as caps to: close typeis disclosed in St Patent No; 2;370,666 is-- 1'5: theend of a duct section, on may-become theends sued to=Herbert JohnsomonManchfiylQfi; oi: tanks. 7

In my prior machine,. the work fed: by two The illustrated machine is adapted for: doing driven. rolls and? the flangingi is: doneby a. non:- this type of work-owingtothe provi'sion therein, driven rotatable tool which is moved; radially" of: as another feature of the invention, of means the upperrollito form aflang'e about the latter. :0 for swinging the anvil and tool angular-1y in op- One object oi the present inventiontisto proviiiei p'osi te directions-to such" an extent a's-to: reverse an improved andisimplified; machine: of. this type.- their relative-position-with respect tothe axis at Accordingly, in the:illustratedmachinerthezieedthe blank, Inthisinstan'ce a blankcan* not be ing of the blank.andalso the formingi of a flange guided by its outer periphery since the flange is are eiiect'ed by only two instrumentalities,. an. formed at that location. Accordingly, when an anvil havingend: and. side surfaces. and; a flangext'ernal flange is-formed on-a blank by the use of ingv tool, the anvil! and toolboth. beingirotataliles the illustrated machine, the guiding of-the blank and driven. As hereim illustrated; the: tool is iseifect'ed'by a pivot constituting, iii combination mounted. for movement axially thereof and isa an"- witlr the-flanging instrumentaliti'es, anotherfearanged to hold the'blank" driving: engagement time of' the invention. As hereinillustrated, the with the end-1 surface of theanvil;v as well. as to pivot is adapted to engage the blank at its center form: the flange abou-t'the anvil; Since-the tool. and; to be fixed in any position of adjustment and anvil-are driveniaizthe-same peripheralspeed, radially of the anvil andtooT-in accordance with drag: is exertediagainstithework hy'th'e flang"-- the desiredheight of the flange and the sizeof ing to'o'l'. Thus a: positive-and regularfee'd move 35 the blank being operated upon.

ment is-insured, and atthe same time, distortion-L With the above and other objects-and features of theworkiand r anytendency foritito ja'm in the: i'mview, the invention will now'be described-with guidingmeans-is eliminated. reference to the accompanying drawings which A certain amount of bending of the-- flange; be lustrate a preferred embodiment of the=invenyondits desired position maybe necessary, as the 41)" tion and will be pointed out in the claims'.

flange is being formed; to insure that the flange In the drawings:

will? finally stand at the" desired. angle from the Fig. 1 is a view in-front elevation of anillustra- Wb.- The work-engaging: members of ahanging-v tive'machine embodying the invention;

machine maybe constructed and!arran'ge'd prop Fig. 2 is a plan view showing the tables; parts erl'y toform' aiflange'orrmateri'al of one thickness 45 of the machine above it being brokenaway, and

or kind; but the same machine may" not be illustrating the guiding of the blank in afianging adapt'edsfor forming aifiang-e atith'edesired angle operation;

to the web when'operating on materialo'f another Fig. 3 is a sectional plan View showing the thicknessor kind, unless it includes-- prcivisi'on for flanging tool andits-operating means, the sectionaitering; the relation: betweenthe work-engagingbeing taken slightly below the level of the table;-

members'in accordance with the new:' conditions. Fig. 4 is a sectional front l v ion ill r in Accordingly, the invention imanotli'er'aspect in the. mounting and: arrangement of the anvil andeludes the provision of an adjustment for both: hanging tool, andtheirrelation to a; blank when the: anvil and the fiangingz tool. in: the present: a fiange is formedonaniinternal marginthereof;

machine bywhich, while maintaining-fthe pi oper 5 Fig; 5 is a fragmentary sectional view of one V by a screw 32.

(Fig. 1), of welded H-beam construction, to one end of which is fixed a pedestal I2 adapted to support one end of a table I4. The other end .of the table is fixed to an arm I6, integral with the base I0, and arranged to extend above and centrally over the left-hand end of the table. A bracket I8,

having a slide-way in which a slide'20 may be' adjusted vertically, is mounted for angular adjustment on a pivot 22 fixed to the arm I6, for a purpose to be explained later. This adjustment is made by turning a hand wheel 23 which drives a gear 2-4 arranged to mesh with a gear segment 25 formed in the bracket I8. gear 24 are fixed to a shaft rotatably mounted in the arm I6. Upon completing the adjustment of the bracket I8, it is clamped in position by setting up bolts 26 which pass through arcuate slots in the bracket and are threaded into the arm I6.

Fixed to the slide (Fig. 4) is a housing 21, in which a shaft 28 is mounted to rotate on roller bearings 29 and 30. The lower end of the shaft 28 has the. form of a truncated pyramid and is adapted 'to be received in a similarly squared recess in an anvil 3| which is secured to the shaft The anvil 3I has frusto-conical end and side. surfaces, the former being knurled to insure a positive 'feeding action.

The anvil 3I 'is' adjusted into proximity to a blank or workpiece on the'table I4 by turning a lever 34 carried by a shaft 36, the latter being mounted to rotate in the, bracket I8. A pinion 38, fixed to the shaft 33, is arranged to mesh with a rack cut in the slide 20, the latter thus being moved heightwise when the lever 34 is operated.

The slide 20 may be locked to the bracket I8 by setting up a clamp 40 having a shank threaded in the bracket I8, and adapted to bear' against the slide 20. The, blank is supported directly underneath the anvil' 3| by a block 4I (Fig. 4) and a roll 42 which is mounted to rotate freely in the block. The block is adapted'to be turned end for end and to be adjusted lengthwise of the table, as illustrated in Figs. 4 and 6, in a slideway formed at the sides of an opening 43 in the table I 4.

The shaft 28 is driven by anelectric motor 44 (Fig. 1) which is mounted on the top of the bracket I8, through connections comprising a worm 45 fixed to the'motor-shaft and a worm gear 46. The gear 48 and the shaft 28 are splined to provide a driving connection therebetween regardless of the adjustment of the slide 20 heightwise .of the table I4.

A power-driven rotary, and axially movable flanging tool 48, and the anvil 3I, cooperate, as will be more fully pointed out below, to impart a feed movement to the workpiece and also to form a flange thereon as indicated in Fig. 4.

The fianging tool 48 has a frusto-conical side surface, a rounded end surface, as clearly illustrated in Fig. 4, and is secured to the upper squared end of a shaft 50 by a screw 52. The shaft 50 is mounted to rotate in a sleeve 54 on roller bearings 56 and 58, the sleeve being arranged to slide vertically in a housing 60. ,A rubber shield 6| arranged to cover the upper end The hand wheel and lengthwise of the machine in a slideway 62 on a carriage 64, and the latter is arranged to tilt in a vertical plane about a shaft 66, carried by a boss 68 fixed to the frame I0.

The flanging tool 48 is driven in rotation by an electric motor 10 (Fig. 3) which is mounted on a bracket I2 fixed to the housing 60. A driving connection between the motor and the flanging tool is provided by a Worm I4, fixed to the motor shaft, and a worm gear 16 splined to the shaft 50, the gear being rotatably mounted in the housing 60 as shown in Fig. 4. The fianging tool 48 is moved axially by turning a hand-wheel I8. (Fig. 3), which is rotatably mounted in a bracket 86, fixed to the housing 68. The hand-wheel I8 is fixed to a shaft 82 which carries a gear 84 arranged to mesh with another gear 86, formed on the right-hand end of a worm 88. The worm and gear 86 are mounted to rotate in the housing 60. A shaft 90, also mounted to rotate in the housing 60, has .on.on'e end a worm .gear 92, arranged to mesh with the worm 88. On the other end of the shaft 00 is fixed a pinion 94 (Fig. 4) which meshes with a rack cut in the 7 I00 fixed to the carriage 64. A threaded shaft I02 rotatably mounted :on the carriage 64 has fixed to its right-hand end a gear I04 adapted to mesh with another gear I 06, the latter being fixed to the shaft 96. The shaft I02 is threaded into a plate I08 (Fig. 4) which is secured to the base of the housing and accordingly, when the shaft I02 is rotated, the housing 60 is moved lengthwise of the machine in the slide-way 62. V

Angular adjustment of the fianging tool 48 radially of the anvil-3| is effected by turning a hand wheel IIO (Fig. 3) which is fixed to a shaft I I2, the latter being rotatably mounted in bracket II4, extending from the left-hand end of the carriage 64. A gear H6, fixed to the shaft H2, is arranged to mesh with another gear I I8, which is mounted to rotate on a yoke I20, the latter being pivoted at I 22 to the bracket 1 I4. The gear H8 is internally threaded to receive a screw I24 (Fig. 4) which is pivoted at I26 to a boss I28 fixed to the frame I0. Itis now apparent that by turning the hand-wheel I I0, the gear I I8 may be moved up or down on the screw I24, and that a corresponding tilting movement is imparted to s the carriage 64;

of the sleeve prevents scale and dirt from entering V A blank to be flanged is located and guided properly with respect to the anvil SI and flanging tool 48, as will be'more fully pointed out later, 7

by a guide comprising rolls.I30 and I32 (Fig. 2), which are rotatably mounted on arms I34 and I38 respectively and are adapted to be engaged by the periphery of the blank.

The arms I34'and I36 are pivoted at I38 and I40 respectively, to a plate I42 having holes which slidably receive bolts I44 (Fig. 1), threaded at their lower ends into a block I46. The block is dove-tailed in cross section and is'adapted to fit ,within, and'slide lengthwise of the table'I4, in a similarly shaped groove I48 in the middle of the top of the table. The guide may thus be positinned at any location lengthwise of the table in.

order td determinathe width; of? the; margin: of: theeblank toahe flanged; The guide is fixedr in such position; by: tightening;- a: clamp; lie, the shank ofwhichis threaded'intopa bar. I5.2rthrough the bolts l M-ealsoxextend. Whenthe? clamp I5ii'stightened, it presses-1 dorwrrwardiagainst theplate: M2, and1thus foroes'the arms" I34' and 533 against thetable." Similarly the-bar- 'l 5 2 E iszrraisedandabyvliftingthe bolts. i44 causessthe block Mt:- toibeawedged: tightly imthe. groove It 3:;.wherebyr the-guidezis-locked to. the table; Adjhstmentof:

the rolls: I3lhan'd': I321 laterally of eachzotheninorder; to accommodate: blanks. of Widely varying. diameters; .ise effecteds by adjusting. a turn. buckle I53 (Fig. 2), the threaded. shanks of; which are piyotedat [5433116 15 I5fi tothe; arms I34 and. I355 respectively; The: arms are: further provided; with" segmental 1 gearsv which. insure that? the rolls will: alwayswbe. at equal distances frmmthe; center. linezof the table;

The: guide is so: locateddengthwiset of the table thaztwhen a: blank is: in engagement. with the rolls: I30. and; I32; as illustratedin Fig. 2, the portion of the. blank; which; is to form. the flange isitothearight .oftheianvil 31-. and' over 'thefianging tool: '48-; the: latter, at; the beginning of a: flang ingzoperation; beinginthe recess '43- andrbelow the top of; thetable. Thebla-nk is constantly held against the-rolls lfill andl I32. by another pair of;

rolls lfiil-and: I66, the latterrolls being mountedonarms- I62 and IE3.- respeotively. These arms are: adapted! tobe adjustedi with respect to eachother: and to bezclampedto the table. inthe same manner asthat' employed in connection with the armsl 34 and I 36 described above. tion of the roll I60 will now be described in detail-with referenceto Fig. 5, it being understood thatea'ch of the-other rolls I50, I32; and I58;is of the same construction;

The-.roll-comprises asleeve Ifid the-outerside 50 of: which isthreaded to receivea collar" I 6=adapt-- ed to be adjusted vertically on-thewsleeve iniorderi to accommodate blanks of varying thicknesses. Thesleeve. lfifl. is attached'by a pressfit tetheouter. race- Hit-of a ball bearing, the inner race I68:- ofwhichis pressed onto a stud: I'll The arm. I63 is bored-to receive the stud. the latter being threaded and heldon the-arm bya'nut i121. To-assisttheoperator in adjusting the collar l he may insert a temporary-locking. bar us into:

aligned holes in the arm I53 and-the sleeve M35. whereby rotationzof the latter is preventedwhen the collar. I65.is-rotated.. The; collar issecured. inadjusted positionv on: the sleeve-by a setscrew. I-l.5,.the inner end of which engages. the threaded portion. of the sleeve I64.

The operation and. adjustment. of. the machine. willnow be-describe.d with referenceto the, fOLu. ingof aflange. on aninternal margin. oi an. annullar bl'ank,,it being assumed first that the flange. is to. be. formed at substantially a right. angle to the web of the blank.

The bracket I8 is first adjusted angul'arly about the pivot 22Jso that the portion of the side surface of the anvil 3Ii nearest to the Hanging tool K8 (the latter being to the rightof the anvil as illustrated in Fig. 4) is either vertical or is inclined at an angle which is slightly acute with respect tothe webportion of the blank. Thisadjustment' is made by turning the hand-wheel 2'3 and settingup the bolts 26.. The position of the anvil 3| heightwise of the table is next adjusted by operating the lever, 34, thereby lowering the slide ZOJtO-a point where the anvil 3'I bears lightlyon the'blank; The guide-rolls- I30; I32, I58, and

The construcr is just. belowthe blank, is next adjusted,-, by;

operating the hand-wheel I I0; sothat its axissis; either verticalorinclined". slightly toward the; position inwhichxit is illustratedrinFig; 4. The flanging tool is also-adjustedlengthwise Ofg'thfls machine; by operatingthe hand-wheel 96-,- to such. a: position that. when the-tool is elevated, itviz-ill be-spaCedfrQmthe anvil: S-I -by a distancesubstantially" equal to. the thickness of: the blank-a Assuming, new that themotors I0 and- M are. operating, the handwheel 18'- turned\ to. bring; the hanging tool l 48 into contact, with the lower: surface: of the'blankh A-t thisstage, the; feeding; movement ofzthe. blankbegins, the blank being;- held by-theiflanging tool-againstthe knurled-end surface of-the any-i1 Ii-I, throughout. the hanging;- operation; Thehand+Wheel His-further operatedztoraisethefiangingtool 48; which, asilluse trated in Fig. 4-, progressively bends, the inner margin-of the-blank:about the lower edge'of the anvil 3i; towards, or into contact. withv its: side: surface. The flanging-operation can'bethuscarried out, on most-.typesaof. material. by asingle upwardmo ement-of theaflanging tool when it:is adjusted. as. describedabove., In. this. situation, the flang-ing-action occursfor the most part; atthe-upper rounded surface of. the hanging tool, theroiordinarily being a slight clearance between. the side surface of the flang-ing tool and the inside-- suriaceof. the flange: If necessary, however; the flanging. tool 48. canv be readjusted. toward the end. of. theflanging operation by further tilting thefiangingtoolinto-the positioninwhieh it is illustrated'in Fig. hthisadjustment being accormpaniedby aslightmovement. of. the flanging tool tothe left, effected by turning the hand-wheel 36. Accordingly, as illustrated in. Fig. 4-, under the conditions of the adjustmentlast. described, the anvil 3I. and. the fianging tool edwill. have line contact with theflange on opposite sides thereof.

throughoutits height. When theflangingoperationis completed. they flanging tool. 48 is firstv moved to the. right by operating the hand-wheel 9andthen islowered below the topof the table taperinit. anew blank to be placed thereon.

When a flange isv to be formed on the outer marginoff ablank, the. anvil 3A. and the flanging, tool 48 are angularly, adjusted. to positions. in. which their relation is thereverse of. that illustrated in Fig. 4. That is, the flanging tool, is

to the. left. of'the anvil, as illustrated in Fig. 6.

Otherwise, thetool and anvil are operated as described above. In this case however, the guide rolls referred to above can not" be used since, it is the margin of the blank which is flanged. Ac-

i cordingly the biank is guided by a pivot. Ilfi (Fig.

m opening of any size in a blank. Hence, the ma.-

chine is adapted for guiding annular blanks of the type illustrated in Fig. 4; as'well as the solid circular type illustrated in Fig. 6', in connection with an external fianging operation. The pivot I-I'Ii is rotatably mounted on a ball bearing I18! 7 theinner race of thelatter being-attached to a screw I80 which is threaded into an arm I82. The arm is mounted to slide lengthwise of the machine on the lower flange of a beam I84 which is bored at its right-hand end to' receive the pedestal I2. A collar I86 which may be clamped to the pedestal I2, is adapted to support the beam at a convenient height above the table and to permit the beam to be swung out of the way when not in use. When a blank has been centered and located on the table properly, the beam I84 and arm I82 are moved to'align the pivot I16 with the punch mark or hole in the blank. Thescrew I'80 'is'next turned to bring the pivot into register with the mark or hole. The

pivot-is then fixed in this position by securing the arm I82 to the beam I84 and also by securing the latter to the pedestal I2. To this end, a 7

set screw I88 isthreaded in the arm I82 and is adapted to be seated against the lower flange of the beam I84, whereby the arm I 82 is clamped to the beam. The beam is similarly locked to the pedestal by tightening bolts I90. 7

The blank is prevented from'buckling away from the table by the use of one or more guides of the type illustratedin Fig. 6, each guide comprising a caster I92 mounted to roll on the blank just inside of the base of the flange. The guide comprises a base I94 which is clamped. by'a bolt I98 to the table I4 outside'of the area of the table covered by the blank. On'one pair of arms (one a of which is indicated at I98) extending horizontally from the base I94, is pivoted a link 200, having a hole adapted to receive the shank 202 of the caster I92. ceive a nut 204, threaded on the shank 202, and which is adapted on being turned to adjust the caster I92 heightwise of the table. The caster is adapted to be swung upwardly above the finished flange to facilitate the removal of the work from the machine, and is thus, operated by swinging a bell crank 206 ina clockwise direction. The bell crank is pivotally mounted at 208 on the base I94. The lower arm of the bell crank 206 is pivoted to one end of a toggle link 2 I 0, the other end of whichis pivoted to a lug extending upwardly from the link 200.

The link 200 is slotted to re in driving engagement with the end and side' surfaces of said anvil and to bend a margin of the blank about said anvil, and means for holding said blank against translational movement while in driving engagement.

2; A machine for flanging a marginal portion of the inner periphery of an annular blank, said machine comprising an anviland a flanging tool,

means associated therewith for adjusting'said anvil and tool into engagement with the opposite faces of the blank and in offset relation with respect to the marginal portion thereof, means for" rotating said anviland tool to impart rotative feed movementto the blank, a block mounted in the proximity of the point of engagement of said anvil and said tool, a roller 'rotatably mounted in said block in cooperative relationship with said anvil and said tool for supporting the portion of said blank adjacent said marginal portion, means adjustable to engage the periphery of the blank to hold the same against translational movement but permitting said rotative feed movement, a section of the adjusting means associated The illustrated machine may be converted into a rotary shearing machine by substituting for the fianging tool 48 a sharp edged tool similar to the anvil 3i. In adjusting the machine for a shearing. operation, the anvil and shearing tool are positioned with their edges substantially tangent to each other, the anvil and tool being angularly adjusted so that elements of their side surfaces at the point of tangency are aligned and perpendicular to the top of the table I4.

The invention described herein may be manufactured and used by or for the Government of the United States of America for Government purposes without the payment of any royalty thereon or therefor. 7

Having described my invention what I claim as novel and desire to protect by Letters Patent of the United States is: r

1. A flanging machine comprising a table, an anvil having an end surface and a frustro-conical side surface, a fianging tool, means for angularly adjusting said anvil to permit its being positioned 7 with either of two opposite elements of its conical side surface substantially perpendicular to said table, means for adjusting said tool radially of said anvil whereby said tool can be brought into operative relation to said anvil adjacent to either toward the marginal with the tool being operable to advance the tool against the anvil. r V

3. A machine for fianging the internal periphery of an'annular blank according to claim-2 wherein said guide means includes a plurality of rolls engageable simultaneously with the periphery of the blank and an adjacent portion of at least one of its faces. 7

4. In a machine for flanging the internal periphery of annular blanks, an anvil, a flanging tool, each having end and side faces, means for adjusting said anvil and tool so that their side faces lie in offset relation with respect to a mar I ginal portion of a blank and their end faces engage the opposite faces of the blank; means for driving said anvil and toolin rotation to impart a rotative feed movement to said blank, a block mounted in the proximity of said anvil, a roller rotatably mounted in said block in cooperative relationship with said anvil and said flanging tool for supporting said blank on the face thereof boundary of a marginal portion thereof, means for rotating said anvil and tool to impart a rotative feed movement to said blank, a block mounted in the proximity of said'anvil, a roller rotatably mounted in said block in cooperative relationship with said anvil and said flanging tool for supporting said blank on the face thereof engaged by said anvil, means for engaging saidblank to hold it guide I portion to bend said portion against translational movement, means for moving said anvil and tool relatively to each other transversely of the plane of the blank, and means to reverse the relative positions of said anvil and tool with respect to the rotation axis of the blank, whereby a flange can be formed progressively about said anvil on either an internal or an external margin of the blank.

6. A machine for flanging the inner periphery of an annular blank, said machine comprising a table, an anvil, a flanging tool, a block adjustably mounted in the proximity of said anvil, a roller rotatably mounted in said block in cooperative relationship with said anvil and said fianging tool for supportng said blank, means for driving said anvil and said tool in rotation to impart a feed movement to said annular blank when disposed therebetween, means for moving said tool transversely to the plane of d blank, thereb to bend a margin of the blank about said anvil, and guide rolls mounted on said table peripherally to engage and hold said blank against translational movement during its feed movement.

7. A machine for fianging the inner periphery of an annular blank, said machine comprising a table, an anvil, a fianging tool, means for rotating said anvil and tool to impart a rotative movement to said blank positioned therebetween, said anvil and said tool being supported for engagement with opposite faces of said blank on opposite sides of the inner boundary of a marginal portion thereof, a block adjustably mounted on said table in the proximity of said anvil, a roller rotatably mounted in said block in cooperative relationship with said anvil and said flanging tool for supporting said blank near said inner boundary, guiding means constructed and arranged to maintain a constant relation between said inner boundary and said anvil and tool, and means for moving said tool axially while the blank is rotated to bend said marginal portion progressively into engagement with said anvil, and means for adjusting said anvil with respect to the plane of the blank whereby the angle between the flange and the faces of the blank may be varied.

8. A machine for fianging a periphery of a blank, said machine comprising, a table, an anvil having an end surface and a frustro-conical side surface, a fianging tool, means for angularly adjusting said anvil to permit its being positioned with either of two opposite elements of its side surface substantially perpendicular to said table, means for adjusting said flanging tool radially of said anvil whereby said tool can be brought into operative relation to said anvil adjacent to either of said elements of its side surface, a block adjustably mounted in the proximity of said anvil, a roller rotatably mounted in said block in cooperative relationship with said anvil and said tool for supporting said blank, means for rotating said anvil and tool, means for moving said tool, axially in proximity to the side surfaces of said anvil, thereby simultaneously to hold said blank in driving engagement with the end and side surfaces of said anvil and to bend a margin of said blank about said anvil, and means for said blank against translational movement while in driving engagement.

9. A machine for fianging the external periphery of a circular blank, said machine comprising the apparatus of claim 8 wherein said last mentioned means comprises a pivot supported on an arm and adapted to engage said blank at its center, said arm being attached to and extending over said table, whereby said blank is caused to rotate about a fixed axis while in driving engagement.

10. A machine for fianging the internal periphery of an annular blank, said machine comprising the apparatus of claim 8 wherein said last mentioned means includes a plurality of rollers adjustably mounted on said table, said rolls being engageable simultaneously with the outer periphery of said blank and an adjacent portion of at least one of its faces.

HERBERT L. JOHNSON.

REFERENCES EETED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 205,241 Campbell et a1 June 25, 1878 318,889 Fox May 26, 1885 1,772,500 Schumacher Aug. 12, 1930 2,364,734 McGlone et a1 Dec. 12, 1944 2,370,666 Johnson Mar. 6, 1945 

